A Mild Method for the Generation and Interception of 1,2-Cycloheptadienes with 1,3-Dipoles
作者:Yaseen A. Almehmadi、F. G. West
DOI:10.1021/acs.orglett.0c02172
日期:2020.8.7
Seven-membered cyclic allenes are mostly known for their propensity to undergo rapid dimerization, and relatively little has been reported regarding their cycloaddition reactivity with 1,3-dienes or 1,3-dipoles. This work describes the trapping of 1-acetoxy-1,2-cycloheptadiene and its unsubstituted counterpart, generated via desilylative elimination, with a range of 1,3-dipolar trapping partners, affording
1,2-环庚二烯是一种应变的,瞬态物质,已未被充分利用为合成构件。七元环状亚丙基最因其易于快速二聚而闻名,关于它们与1,3-二烯或1,3-偶极的环加成反应性的报道相对较少。这项工作描述了通过一系列的1,3-偶极捕获伙伴,通过脱甲硅基消除生成的1-乙酰氧基-1,2-环庚二烯及其未取代的对应物,从而提供了具有高区域选择性和非对映选择性的复杂多环产物。